AQA GCSE Geography (8035) · The Changing Economic World
Mini-Lesson
The Changing Economic World
This mini-lesson walks you through the whole of the AQA GCSE The Changing Economic World unit: how we measure development, the Demographic Transition Model, why development is uneven and how to reduce the gap, a case study of Nigeria (a Newly Emerging Economy), and the changing UK economy.
Work through each screen, answer the questions as you go (multiple-choice, short-answer and games) and collect ⭐ stars. Press Start when you're ready.
The development gap
How we measure development
Development means how a country is improving for its people — economically, socially and technologically. We measure it with several indicators:
GNI per head — the average income per person (an economic measure).
Birth rate & death rate — births/deaths per 1,000 people per year.
Infant mortality — deaths of children under age 1 per 1,000 live births.
Life expectancy — average years a person is expected to live.
People per doctor, literacy rate (% of adults who can read & write) and access to safe water.
Key term — GNI per head: Gross National Income divided by the population — the average income per person, often adjusted for cost of living (PPP).
Measuring development
Economic vs social measures — and HDI
No single indicator tells the whole story:
Economic measures (e.g. GNI per head, % employed in industry) show wealth, but an average can hide huge inequality within a country.
Social measures (e.g. literacy, life expectancy, access to safe water) show quality of life, but can be harder to collect reliably.
The Human Development Index (HDI) combines several measures into one score between 0 and 1, giving a fuller picture:
HDI = income + education + life expectancy
GNI per head · years of schooling · life expectancy — combined into a single 0–1 score.
Limitation: economic measures alone can mislead — a country can have a high average GNI but poor health or education. That's why HDI blends economic and social data.
Quick check
Which is a social measure?
?Which of these is a social measure of development (rather than a purely economic one)?
Match it
Match the indicator to what it measures
Tap an indicator on the left, then tap what it measures on the right.
Sort it
Economic or social measure?
Tap a measure, then tap the box it belongs in.
💷 Economic measure
🩺 Social measure
Demographic Transition Model
The Demographic Transition Model (DTM)
The DTM shows how a country's birth rate, death rate and total population change as it develops, through five stages:
Stage 1 — high birth rate, high death rate → population low & stable.
Stage 2 — death rate falls (better food, water, medicine); birth rate stays high → population rises rapidly.
Stage 3 — birth rate now falls (contraception, women working, fewer children needed) → population still rising but more slowly.
Stage 4 — birth rate and death rate both low → population high & stable (e.g. the UK).
Stage 5 — birth rate falls below death rate → population begins to decline & age (e.g. Japan).
DTM curves
Reading the DTM graph
The death rate (red) falls first in Stage 2; the birth rate (blue) falls later in Stage 3. Where they cross, total population (green) grows fastest, then levels off in Stage 4 and can decline in Stage 5.
Link to pyramids: Stage 2 gives a wide-based pyramid (many young people); Stage 4–5 gives a narrower base and a wide top (an ageing population).
Quick check
Understanding the DTM
?In which stage of the DTM does the total population grow most rapidly, because the death rate has fallen but the birth rate is still high?
Uneven development
Why development is uneven
Development is not spread evenly across the world. The causes fall into three groups:
Physical — a landlocked country, extreme climate, few natural resources, or a high risk of natural hazards (droughts, tropical storms) all hold back development.
Economic — reliance on a few low-value primary exports, poor trade terms and heavy debt trap countries in poverty.
Historical — colonialism took resources and drew unstable borders; conflict since independence has disrupted growth.
Uneven development
Consequences of uneven development
Uneven development produces real disparities between and within countries:
Wealth — huge income gaps; average income in richer countries is many times higher than in the poorest.
Health — poorer countries have higher infant mortality, lower life expectancy and fewer doctors per person.
International migration — people move from poorer to richer areas/countries (economic migrants), and refugees flee conflict, seeking work and safety.
Exam link: be ready to explain that migration is a consequence of uneven development — people move to close the gap between where they are and where opportunities exist.
Reducing the gap
Strategies to reduce the development gap
Several strategies aim to help poorer countries develop:
Investment & industrial development — foreign money and factories create jobs and income.
Aid — help from richer countries or NGOs; debt relief cancels loans so money can be spent on development.
Intermediate technology — simple, affordable, locally repairable tech (e.g. hand pumps) suited to local skills.
Fair trade — guarantees producers a fair price; microfinance loans give small loans to help people start businesses.
Reducing the gap
Tourism as a strategy — Jamaica
For some countries, tourism is a powerful way to reduce the development gap. Jamaica is a widely used example:
Tourism brings in foreign income and now supports a large share of the country's jobs and GDP.
It creates employment in hotels, transport and services, and funds infrastructure (airports, roads) that also benefits locals.
Problems: many jobs are low-paid and seasonal, some profits "leak" abroad to foreign hotel owners, and tourism can damage fragile coral-reef environments.
Exam tip: for a tourism answer, name the place (e.g. Jamaica), give a benefit (jobs, income, infrastructure) and a drawback (leakage, seasonal work, environmental damage).
Explain it
Your turn — closing the gap
✎Explain how one strategy (e.g. fair trade, intermediate technology, tourism or microfinance) can help reduce the development gap.
Model answer (example — fair trade)
Fair trade guarantees farmers a fair, stable price for their crops (e.g. coffee, cocoa), so their income is more secure.
A share of the money (the fair-trade premium) is invested back into the community — building schools, clinics or clean water.
This raises quality of life and social measures of development, helping to close the gap over time.
Case study: NEE
Case study: Nigeria — an NEE
Nigeria is a Newly Emerging Economy (NEE) in West Africa, on the Gulf of Guinea. It is experiencing rapid economic development.
Importance: Nigeria has Africa's largest population and one of its largest economies; it is a major regional power and oil exporter.
Context: a diverse country with many ethnic and religious groups, a growing film and music culture (e.g. "Nollywood"), but also regional inequality and conflict in the north.
Nigeria — industry & TNCs
Changing industry and TNCs
Nigeria's industrial structure is changing: the share of workers in low-value primary jobs (like farming) is falling, while manufacturing and services grow.
Transnational corporations (TNCs) — large companies operating in several countries (e.g. Shell in oil) — play a big role:
Advantages: they bring investment, create jobs, and transfer skills and technology.
Disadvantages: much of the profit is sent abroad to the company's home country; working conditions and wages can be poor; oil extraction has caused pollution in the Niger Delta.
Sort it
TNCs in Nigeria — advantage or disadvantage?
Tap whether each is an advantage or a disadvantage of TNCs in an NEE like Nigeria.
Nigeria — impacts
Environment, aid and quality of life
Environmental impacts: rapid growth brings problems — oil spills and gas flaring in the Niger Delta, urban air pollution and waste, and loss of vegetation.
Wider world & aid: Nigeria trades more with China and others, and receives aid (e.g. against malaria and for health/education), though corruption can reduce its impact.
Quality of life: economic growth has raised average incomes, improved access to safe water, schooling and healthcare for many — but benefits are unevenly shared, with a large gap between rich cities and poorer rural areas.
Exam tip: a strong NEE answer shows both sides — growth improves quality of life for many, but also creates environmental damage and inequality.
Quick check
Understanding the Nigeria case study
?Which statement best describes a disadvantage of TNCs (like Shell) operating in Nigeria?
The changing UK economy
Why the UK economy changed
The UK has moved from a manufacturing economy to a post-industrial one. Three main causes:
De-industrialisation — the decline of traditional heavy industries (coal, steel, shipbuilding) as they became uncompetitive.
Globalisation — cheaper labour abroad meant manufacturing moved overseas.
Government policy — decisions to support new industries, privatise, and invest in services and technology.
Post-industrial UK
A post-industrial economy
Today the UK economy is dominated by tertiary (services) and quaternary (research/knowledge) work:
IT & service industries, finance (the City of London) and research now employ most workers.
Science & business parks cluster high-tech firms near universities (e.g. Cambridge Science Park) to share skills and ideas.
Modern industry can be more environmentally sustainable — for example Torr Quarry in Somerset restores worked-out sections and manages transport and dust to reduce its impact.
Quick check
The changing UK economy
?The decline of the UK's traditional heavy industries such as coal, steel and shipbuilding is best described as:
UK — change & the wider world
Rural change, transport and the north–south divide
Rural change: some areas near cities grow (commuters move in); remote rural areas decline as young people leave and services close.
Infrastructure: improvements to road & rail (e.g. smart motorways, HS2), and to ports & airports (e.g. Heathrow, Liverpool2), keep the UK connected.
North–south divide: the south-east tends to be wealthier; strategies like enterprise zones and the "Northern Powerhouse" aim to reduce regional differences.
UK in the wider world
The UK's place in the world
The UK stays globally connected through:
Trade — importing and exporting goods and services worldwide.
Culture — TV, film, music and sport with global reach.
Transport & electronic communication — major airports, ports and internet links.
The Commonwealth — historic and trade ties to many countries; and past membership of the EU shaped trade relationships.
Exam link: these links show the UK is part of a globalised world — its economy depends on trade, migration and communication with other countries.
Explain it
Your turn — sustainable industry
✎Using a named example (e.g. Torr Quarry or a science/business park), explain how a modern UK industrial development can be made more environmentally sustainable.
Model answer (example — Torr Quarry)
At Torr Quarry in Somerset, worked-out parts of the quarry are restored — landscaped and replanted to create wildlife habitats.
Impacts are reduced by controlling dust and noise and moving most stone out by rail rather than road, cutting traffic and emissions.
This shows a modern development can keep producing while limiting harm to the physical environment.
Quick check
Why use HDI?
?Why might the Human Development Index (HDI) give a better picture of development than GNI per head alone?
Recap
The key ideas to know
Measuring development: GNI per head, birth/death rates, infant mortality, life expectancy, people per doctor, literacy, safe water — plus HDI (income + education + life expectancy).
Economic vs social: economic measures show wealth (but hide inequality); social measures show quality of life.
DTM: five stages; death rate falls in Stage 2, birth rate falls in Stage 3; population grows fastest in Stage 2.
NEE case study — Nigeria: Africa's biggest economy; growing manufacturing; TNCs bring jobs & investment but send profits abroad and cause Niger Delta pollution.